Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
The theory given earlier for field emission from a curved surface has been extended to use the parameter d characterizing the energy distribution. Measurement of the curvature of the Fowler–Nordheim plot together with d for the same emitter enables the work function of the surface to be deduced, together with emitter…
Ion track lithography has been applied for transferring the self-ordered nanopattern of porous anodic alumina to single-crystalline rutile TiO 2 substrates. As a result, nanometre resolved arrays have been fabricated with an aspect ratio ranging from 5 to 16, over areas of several square millimetres. Differences in th…
In this paper, we report the synthesis of mesoporous nanocrystalline Co3O4 via a one-step, convenient and inexpensive method. The obtained Co3O4 powder samples were characterized by x-ray diffraction, N2 adsorption–desorption experiments and transmission electron microscopy. It is revealed that the molar ratio of the…
Abstract The distribution coefficients of oil and curing agent in PP/EPDM TPV were calculated by measuring the melting point of the PP phase using differential scanning calorimetry (DSC). The PP/EPDM TPV was prepared by using a twin screw extruder and a peroxide curing agent was used. The peroxide induces the degradat…
An assay of L-tyrosine (Tyr) hydroxylating activity operating in lincomycin biosynthesis is described. The assay development consisted of HPLC procedure development, assessing the effect of reaction mixture components on non-enzymatic Dopa and Tyr oxidation, and sample stability evaluation. The HPLC procedure with iso…
The interaction of two organometallic $\ensuremath{\pi}$-aryl $(M{L}_{2})$ complexes, cobaltocene $[\mathrm{Co}{({\ensuremath{\eta}}^{5}\text{\ensuremath{-}}{\mathrm{C}}_{5}{\mathrm{H}}_{5})}_{2}]$ and bis(benzene) chromium $[\mathrm{Cr}{({\ensuremath{\eta}}^{6}\text{\ensuremath{-}}{\mathrm{C}}_{6}{\mathrm{H}}_{6})}_{…
We report on Sb-doped p-type Zn 0.95 Mg 0.05 O thin films grown by pulsed laser deposition. The Sb-doped Zn 0.95 Mg 0.05 O films show an acceptable p-type conductivity with a resistivity of 126 Ω cm, a Hall mobility of 1.71 cm 2 V −1 s −1 and a hole concentration of 2.90 × 10 16 cm −3 at room temperature. Secondary io…
The responsive nature of polyaniline (PANI) to gaseous pollutants is highly dependent on processing conditions, film composition, and morphology. Hybrid systems of leucoemeraldine-based polyaniline (LEB-PANI) have shown to aid in the stability of the material yielding an active matrix for gas sensing. The electrospinn…
Abstract Cuprous oxide hollow nanospheres were prepared by heating a solution of copper acetate and hydrazine as a reductant in 2‐propanol at reflux. The size distribution of the nanospheres is mainly in the range 100–200 nm. The products were characterized by X‐ray diffraction, UV/Vis diffuse reflectance spectroscopy…
Abstract Polyethylene oxide/phenol formaldehyde silica composite hollow spheres were obtained from a fast silicification of a polymer blend, containing polyethylene oxide (PEO) as silica gelator and phenol formaldehyde (PF) polymer as carbon source, in a highly diluted silica solution at pH ≈ 5.0–6.0. The PF–PEO/silic…
Toroidal caged molecules of carbon have been investigated previously as constructed from elbows formed from armchair (5,5) and zigzag (9,0) nanotubes connected through a pentagonal and heptagonal defect at each bend site. In this paper, we consider these elbows, and we describe two new elbows constructed from (3,3)-(5…
Abstract Polyvinyl alcohol (PVA)‐nanofibers‐immobilized lipase were formed by electrospinning. The specific surface area of the nanofiber (5.96 m 2 /g) was about 250 times larger than that of PVA‐film‐immobilized lipase (0.024 m 2 /g). The PVA‐nanofibers‐immobilized lipase were used as the catalyst for the esterificat…
This paper presents an extension of the Jiles–Atherton model, applied for modelling the magnetic characteristics of anisotropic amorphous material. The presented extension of the model takes into account changes in the parameter k during the magnetization process. Such an extension is physically judged. Moreover, the…
The mechanical threshold stress (MTS) model is not commonly used in industrial applications due to its complexity. The Zener–Hollomon parameter Z was utilized to develop a simplified and compact formulation similar to the MTS model. The predictions of the proposed formulation are compared to the results obtained by th…
Praseodymium and vanadium cosubstituted Bi 4 Ti 3 O 12 was synthesized using a modified citrate-gel method. The crystallization was promoted by the oxidation of residual carbon produced by decomposition of −CH x groups resulting in a crystallization temperature as low as 450 °C. The as-synthesized powder consisted of…
Zinc selenide nanoribbons were synthesized on silicon wafers by simple thermal evaporation of high purity ZnSe powder. The x-ray diffraction pattern indicates that all diffraction peaks can be attributed to the zinc-blende structured ZnSe. The selected-area electron diffraction, transmission electron microscopy and Ra…
Abstract A series of iPP/SiO 2 nanocomposites, containing 1, 2.5, 5, 7.5, and 10 wt.‐% fumed silica nanoparticles, were prepared by melt mixing in a twin screw co‐rotating extruder. The effect of different extrusion parameters was evaluated. The size of aggregates increased with increase in SiO 2 content and repetitio…
Abstract The rheological behavior of polypropylene/novolac blends was investigated with special reference to the effects of the blend ratio, compatibilization, and dynamic cure. The polypropylene and all the polypropylene/novolac blends presented evidence of shear‐thinning behavior. The novolac, compatibilizer, and dy…
Abstract The crystal morphology and nonisothermal crystallization kinetics of short carbon fiber/poly(trimethylene terephthalate) (SCF/PTT) composites were investigated by polarized optical microscopy (POM) and differential scanning calorimetry (DSC). The optical micrographs suggest that the more content of SCF in com…
A new route based on electrospinning is designed for the preparation of silver chloride/polyacrylonitrile (AgCl/PAN) composite nanofibres. The AgCl nanoparticles uniform in size, were dispersed on the surfaces of the composite nanofibres. Transmission electron microscopy (TEM) images gave direct evidence of the struct…